Issue link: https://www.e-digitaleditions.com/i/1081695
26 I ICT TODAY to install, terminate and test an M12 style connector (see Figure 5). These connectors are often used when connecting end devices in harsh environments. The M12 D code style as shown in Figure 6 uses only two wire pairs. Therefore, a typical permanent link or channel test cannot be used, since it will be looking for all 4 pair. Special test adapters or cables are also required to facilitate testing of the M12 connectors. Devices may also be connected in a ring or linear topology depending on equipment layout and the criticality of the connected devices to the machine or process. Since each installed cable is not home run to a common rack or switch enclosure, as in the traditional star topology which most installers are accustomed to, it is imperative that a standards compliant and easy to follow labelling scheme is established to properly support these topologies. It is also quite common for industrial clients to have their own unique specifications for various pathway types throughout their plant. Installers need to know how to properly install several types of conduit, including schedule 40 galvanized steel, aluminum, stainless, and non-metallic (PVC) conduits; thin wall (EMT) conduit; and several types of tray (e.g., basket, ladder, channel). Besides client standards or preferences, there are applications where electrical codes will denote material type and methodology. Hazardous or classified areas, as defined by NEC/CEC, exist throughout various industries. It is important for an installer to be aware of these areas and understand the code requirements for installing pathways through these spaces, as well as installing work area outlets. The designer will likely specify components, but the installer is responsible to ensure the components are assembled properly so the desired safety intent is met. Hazardous and classified areas are grouped into categories and can use either a Class and Division or a Zone type rating. For further information on the definitions and approved installation methods in these areas, please review the appropriate sections of the electrical code pertinent to the geography of the project. The challenges encountered when installing a grounding/bonding system within an industrial environment are prevalent due to the dynamic nature of the electrical distribution and control systems. In other than industrial buildings, the electrical distribution system is generally designed to be relatively static. The infrastructure, right down to powering the equipment and user devices, is built to support the needs of the occupants for the duration of the building life, and large power use FIGURE 5: Example of a typical M12 connector body. FIGURE 6: Example of M12-X Code (8 pin) and M12-D Code (4 pin) connectors.